Improvement in sash-holders



E. LAASS.

BASH-HOLDER.

Patented Oct. 17, 1876.

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N. PETERS. FHOTO-LITNOGRAPHEH, WASHINGTON. D C.

E STATES EMIL LAASS, OF SYRACUSE, NEW YORK.

IMPROVEMENT m SASH-HOLDERS.

Specification forming part of Letters Patent No. 183,309, dated October17, 1876; application filed June 9, 1875. 7

To all whom it may concern:

Be it known that I, EMIL LAASS, 0f Syracuse, New York, have invented anew and useful Improvement inSash-Fasteners, of which the followingspecification, with its aocompanying drawing, is a full, clear, andexact description.

My invention relates to sash-fasteners which operate on the principle ofa wedge, slide on the screw that secures them to the sash, and arecovered with rubber, so as to increase their binding power.

My invention consists in providing the wellknown wedge-shapedsash-fasteners, having the diagonal slot, with a lateral catch andhandle, of such construction that there is a continuous unbroken surfacearound the fastener for the reception of arubber band, as hereinaftermore fully described and definitely claimed. V

ln the drawing, Figure I shows a view of my sash-fastener in positionfor lockingthe sash when closed Fig. 11, a detached side View of thesash-fastener. Fig. Ill shows it in position for holding up the sashwhen the window is raised, and Fig. IV a section through the line 00 yof Fig. III.

My sash-fastener is made of a thin plate of metal, a, of the form of awedge, so as to economize material and to make it of light weight. ithas a slot, 0, running parallel with one side, and extending nearly fromend to end, by means of which the fastener slides upon the screw 8 thatsecures it to the sash. 1n raising the sash, the plate slides down anddrops upon the screw in the slot; and, in lowering the sash, thefriction against the casing causes the fastener to slide upward until itwedges itself tight against the screw in the slot. The outer edge of thefastener is widened by a flange extending entirely around it, andsufficiently wide to hold a band of rubber, t, or any other suitablematerial, so that the fastener will be bound tighter against thewindow-frame when holding the window open. The rubber also serves tokeep the casing from becoming indented or defaced, and the rubber may beheld from slipping by roughening the surface of the flange. At thebottom of the plate the flange is enlarged, so as to form the beveledhandle 0. This enlargement ends with a square shoulder near the bottomof the wedging-edge, Fig. II, so as to form a lock with the spur r inthe window -casing when the window is closed, which may readily be doneby inverting the fastener and turning the handle around until the squareshoulder rests under the spur. I r I The flange and handle are beveled,in order to facilitate molding and casting; and the whole plate, flange,and handle consist of a single casting. By the taper of the handle itcan be more easily molded and drawn from the sand than if made of anyother form; and this, therefore, is one of the strong points of noveltyin my invention. It will also be observed that, by the wedge-shapedconstruction, the material is used in proportion to the I strengthrequired, and the cost of manufacture considerably reduced.

Heretofore notches have usually been out into the fastener into whichfits the locking-pin. By this construction the device is weakened. Thepin must necessarily be close to the edge of the stop, and, as a result,the fastener is frequently split and ruined; and the size and shape ofthe spur are also limited to the size of the notch. These objections areobviated by my invention. Then, too, by dispensing with the notch andbringing the locking device farther from the back of the plate, I amenabled to apply the rubber band, which otherwise could not well bedone.

What I claim as new, and desire to secure by Letters Patent, is-

The wedge-shaped fastener at, having the diagonal slot 0 and theoutwardlyprojecting catch and handle 0, the outer surfaceof the flangehaving a continuous unbroken surface, adapted to receive a rubber'band,substantially as described and shown, for the purpose set forth.

EMIL LAASS. Witnesses:

JOHN F. JONES, G. HOLMSTRUP, Jr.

